/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.nf.health.app.sweat.service;

import android.annotation.SuppressLint;
import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Binder;
import android.os.Handler;
import android.os.IBinder;
import android.os.SystemClock;
import android.support.v7.app.NotificationCompat;
import android.util.Log;

import com.nf.health.app.R;
import com.nf.health.app.activity.global.MainActivity;
import com.nf.health.app.sweat.util.SweatBluetoothUtils;
import com.nf.health.app.sweat.util.SweatConfiguration;
import com.nf.health.app.utils.LogUtil;

import java.util.List;
import java.util.UUID;

import cn.bluetools.ProtocolParser;

/**
 * Service for managing connection and data communication with a GATT server hosted on a
 * given Bluetooth LE device.
 */
@SuppressLint("NewApi")
public class SweatBleService extends Service {
    private final static String TAG = SweatBleService.class.getSimpleName();
    public static boolean isConnected = false;
    private BluetoothManager mBluetoothManager;
    private BluetoothAdapter mBluetoothAdapter;
    private String mBluetoothDeviceAddress;
    private BluetoothGatt mBluetoothGatt;

    public final static String ACTION_GATT_CONNECTED = "com.nf.health.app.sweat.service.ACTION_GATT_CONNECTED";
    public final static String ACTION_GATT_DISCONNECTED = "com.nf.health.app.sweat.service.ACTION_GATT_DISCONNECTED";
    public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.nf.health.app.sweat.service.ACTION_GATT_SERVICES_DISCOVERED";


    @Override
    public void onCreate() {
        super.onCreate();
    }

    public final static String ACTION_DATA_AVAILABLE = "com.nf.health.app.sweatservice.ACTION_DATA_AVAILABLE";
    public final static String EXTRA_DATA = "com.nf.health.app.sweatservice.EXTRA_DATA";
    private Handler mHandler = new Handler() {
    };

    private int connectTimes = 0;
    // Implements callback methods for GATT events that the app cares about.  For example,
    // connection change and services discovered.
    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            LogUtil.i(TAG, "onConnectionStateChange status:" + status + ">>>>newState:" + newState);
            gatt.discoverServices();
            if (newState == 0) {
                isConnected = false;
                if (mBluetoothGatt != null) {
                    try {
                        mBluetoothGatt.disconnect();
                        mBluetoothGatt.close();
                        mBluetoothGatt = null;
                    } catch (Exception e) {
                        boolean flag = SweatBleService.this.mBluetoothGatt.discoverServices();
                        LogUtil.i("BluetoothLeService", "开始to start service discovery:" + flag);
                    }
                    broadcastUpdate(ACTION_GATT_DISCONNECTED);
                }
            } else if (newState == 2 && status == 0) {
                isConnected = true;
                mHandler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        if (SweatBleService.this.mBluetoothGatt != null) {
                            try {
                                boolean flag = SweatBleService.this.mBluetoothGatt.discoverServices();
                                Log.w("BluetoothLeService", "开始to start service discovery:" + flag);
                            } catch (Exception var2) {
                            }
                        }
                    }
                }, 600L);
                broadcastUpdate(ACTION_GATT_CONNECTED);
            } else if (status == 133 && newState == 2 && connectTimes < 4) {
                isConnected = false;
                Log.d("BluetoothLeService", " repeat connect.." + connectTimes);
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            LogUtil.i(TAG, "onServicesDiscovered status:" + status);
            if (status == BluetoothGatt.GATT_SUCCESS) {
                try {
                    Thread.sleep(200L);
                } catch (InterruptedException var4) {
                    var4.printStackTrace();
                }
                BluetoothGattService mBluetoothGattService = mBluetoothGatt.getService(UUID.fromString(SweatConfiguration.SERVICE_UUID));
                BluetoothGattCharacteristic mBluetoothGattServiceCharacteristic = mBluetoothGattService.getCharacteristic(UUID.fromString(SweatConfiguration.NOTIFY_UUID));
                setCharacteristicNotification(mBluetoothGattServiceCharacteristic, true);
                broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
            }
        }

        @Override
        public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
            LogUtil.i(TAG, "onCharacteristicRead status:" + status);
            if (status == BluetoothGatt.GATT_SUCCESS) {
                broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
            }
        }

        @Override
        public void onCharacteristicChanged(BluetoothGatt gatt,
                                            BluetoothGattCharacteristic characteristic) {
            broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
        }

        @Override
        public void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
            LogUtil.i(TAG, "onDescriptorRead" + descriptor.getUuid());
            super.onDescriptorRead(gatt, descriptor, status);
        }
    };

    private void broadcastUpdate(final String action) {
        final Intent intent = new Intent(action);
        sendBroadcast(intent);
    }

    private void broadcastUpdate(final String action,
                                 final BluetoothGattCharacteristic characteristic) {
        final Intent intent = new Intent(action);

        final byte[] data = characteristic.getValue();
        intent.putExtra(EXTRA_DATA, data);
        sendBroadcast(intent);
    }


    public class LocalBinder extends Binder {
        public SweatBleService getService() {
            return SweatBleService.this;
        }
    }

    @Override
    public IBinder onBind(Intent intent) {

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        builder.setSmallIcon(R.mipmap.ic_launcher);
        builder.setContentTitle("Foreground");
        builder.setContentText("I am the sweat service");
        builder.setContentInfo("Content Info");
        builder.setWhen(System.currentTimeMillis());
        Intent activityIntent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 1, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        builder.setContentIntent(pendingIntent);
        Notification notification = builder.build();
        startForeground(2, notification);

        return mBinder;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        // After using a given device, you should make sure that BluetoothGatt.close() is called
        // such that resources are cleaned up properly.  In this particular example, close() is
        // invoked when the UI is disconnected from the Service.
        try {
            close();
            disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return super.onUnbind(intent);
    }

    private final IBinder mBinder = new LocalBinder();

    /**
     * Initializes a reference to the local Bluetooth adapter.
     *
     * @return Return true if the initialization is successful.
     */
    public boolean initialize() {
        // For API level 18 and above, get a reference to BluetoothAdapter through
        // BluetoothManager.
        if (mBluetoothManager == null) {
            mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
            if (mBluetoothManager == null) {
                Log.e(TAG, "Unable to initialize BluetoothManager.");
                return false;
            }
        }

        mBluetoothAdapter = mBluetoothManager.getAdapter();
        if (mBluetoothAdapter == null) {
            Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
            return false;
        }
        return true;
    }

    /**
     * Connects to the GATT server hosted on the Bluetooth LE device.
     *
     * @param address The device address of the destination device.
     * @return Return true if the connection is initiated successfully. The connection result
     * is reported asynchronously through the
     * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     * callback.
     */
    public boolean connect(final String address) {
        if (mBluetoothAdapter == null || address == null) {
            Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
            return false;
        }

        // Previously connected device.  Try to reconnect.
        if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
                && mBluetoothGatt != null) {
            Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
            return mBluetoothGatt.connect();
        }

        final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
        if (device == null) {
            Log.w(TAG, "Device not found.  Unable to connect.");
            return false;
        }
        // We want to directly connect to the device, so we are setting the autoConnect
        // parameter to false.
        mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
        Log.d(TAG, "Trying to create a new connection.");
        mBluetoothDeviceAddress = address;
        return true;
    }

    /**
     * Disconnects an existing connection or cancel a pending connection. The disconnection result
     * is reported asynchronously through the
     * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     * callback.
     */
    public void disconnect() {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.disconnect();
    }

    /**
     * After using a given BLE device, the app must call this method to ensure resources are
     * released properly.
     */
    public void close() {
        if (mBluetoothGatt == null) {
            return;
        }
        mBluetoothGatt.disconnect();
        mBluetoothGatt.close();
        mBluetoothGatt = null;
    }

    /**
     * Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
     * asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
     * callback.
     *
     * @param characteristic The characteristic to read from.
     */
    public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.readCharacteristic(characteristic);
    }

    public void writeCharacteristic(BluetoothGattCharacteristic characteristic) {
        mBluetoothGatt.writeCharacteristic(characteristic);
    }

    /**
     * Enables or disables notification on a give characteristic.
     *
     * @param characteristic Characteristic to act on.
     * @param enabled        If true, enable notification.  False otherwise.
     */
    public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
                                              boolean enabled) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
        BluetoothGattDescriptor clientConfig = characteristic.getDescriptor(UUID.fromString(SweatConfiguration.CLIENT_CHARACTERISTIC_CONFIG));
        if (enabled) {
            clientConfig.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
        } else {
            clientConfig.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
        }
        mBluetoothGatt.writeDescriptor(clientConfig);
    }

    /**
     * Retrieves a list of supported GATT services on the connected device. This should be
     * invoked only after {@code BluetoothGatt#discoverServices()} completes successfully.
     *
     * @return A {@code List} of supported services.
     */
    public List<BluetoothGattService> getSupportedGattServices() {
        if (mBluetoothGatt == null) return null;

        return mBluetoothGatt.getServices();
    }

    public static IntentFilter makeGattUpdateIntentFilter() {
        final IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(SweatBleService.ACTION_GATT_CONNECTED);
        intentFilter.addAction(SweatBleService.ACTION_GATT_DISCONNECTED);
        intentFilter.addAction(SweatBleService.ACTION_GATT_SERVICES_DISCOVERED);
        intentFilter.addAction(SweatBleService.ACTION_DATA_AVAILABLE);
        return intentFilter;
    }


    public boolean sendCommandToSweat(int commandType, int sampleFre) {
        //获得发送命令
        byte[] writeByte = SweatBluetoothUtils.getCommandByte(commandType, sampleFre);

        try {
            if (commandType == 0) {
                LogUtil.e("发送读取命令", ProtocolParser.binaryToHexString(writeByte) + ">>>>" + writeByte.length);
            } else if (commandType == 1) {
                LogUtil.e("发送频率命令", ProtocolParser.binaryToHexString(writeByte) + ">>>>" + writeByte.length);
            }
            byte[] writeByteOne = new byte[20];
            byte[] writeByteTwo = new byte[writeByte.length - 20];
            System.arraycopy(writeByte, 0, writeByteOne, 0, 20);
            System.arraycopy(writeByte, 20, writeByteTwo, 0, writeByteTwo.length);
            BluetoothGattService mBluetoothGattService = mBluetoothGatt.getService(UUID.fromString(SweatConfiguration.SERVICE_UUID));
            LogUtil.e("分段发送", ProtocolParser.binaryToHexString(writeByteOne) + ">>>>" + writeByteOne.length);
            BluetoothGattCharacteristic mBluetoothGattServiceCharacteristic = mBluetoothGattService.getCharacteristic(UUID.fromString(SweatConfiguration.WRITE_UUID));
            mBluetoothGattServiceCharacteristic.setValue(writeByteOne);
            this.writeCharacteristic(mBluetoothGattServiceCharacteristic);
            SystemClock.sleep(30);
            LogUtil.e("分段发送", ProtocolParser.binaryToHexString(writeByteTwo) + ">>>>" + writeByteTwo.length);
            mBluetoothGattServiceCharacteristic.setValue(writeByteTwo);
            this.writeCharacteristic(mBluetoothGattServiceCharacteristic);
        } catch (Exception e) {
            LogUtil.e("发送命令失败");
            isConnected = false;
            LogUtil.exception(e);
            return false;
        }
        return true;
    }
}
